Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / Orcas / QFE / wpf / src / Framework / MS / Internal / Navigation / JournalEntryStack.cs / 1 / JournalEntryStack.cs
using System; using System.Collections; using System.Collections.Specialized; using System.Collections.Generic; using System.Diagnostics; using System.Windows.Threading; using MS.Internal; using MS.Internal.AppModel; using MS.Utility; using System.ComponentModel; namespace System.Windows.Navigation { ////// This is the base class for the JournalEntryBackStack and JournalEntryForwardStack /// classes. /// internal abstract class JournalEntryStack : IEnumerable, INotifyCollectionChanged { internal JournalEntryStack(Journal journal) { _journal = journal; } internal void OnCollectionChanged() { if (CollectionChanged != null) { CollectionChanged(this, new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset)); } } internal JournalEntryFilter Filter { get { return _filter; } set { _filter = value; } } internal IEnumerable GetLimitedJournalEntryStackEnumerable() { if (_ljese == null) { _ljese = new LimitedJournalEntryStackEnumerable(this); } return _ljese; } LimitedJournalEntryStackEnumerable _ljese; protected JournalEntryFilter _filter; public event NotifyCollectionChangedEventHandler CollectionChanged; public abstract IEnumerator GetEnumerator(); protected Journal _journal; } ////// This class exists to provide an IEnumerator over the BackStack. /// internal class JournalEntryBackStack : JournalEntryStack { public JournalEntryBackStack(Journal journal) : base(journal) { } public override IEnumerator GetEnumerator() { //Debug.WriteLine("Getting BackStack"); return new JournalEntryStackEnumerator(_journal, _journal.CurrentIndex - 1, -1, this.Filter); } } ////// This class exists to provide an IEnumerator over the ForwardStack. /// internal class JournalEntryForwardStack : JournalEntryStack { public JournalEntryForwardStack(Journal journal) : base(journal) { } public override IEnumerator GetEnumerator() { //Debug.WriteLine("Getting ForwardStack"); return new JournalEntryStackEnumerator(_journal, _journal.CurrentIndex + 1, 1, this.Filter); } } ////// This will enumerate over the navigable JournalEntries in the journal, starting at start, /// going in the direction of delta, and returning no more than _viewLimit values. /// This is used for display purposes. /// internal class JournalEntryStackEnumerator : IEnumerator { public JournalEntryStackEnumerator(Journal journal, int start, int delta, JournalEntryFilter filter) { _journal = journal; _version = journal.Version; _start = start; _delta = delta; _filter = filter; this.Reset(); } public void Reset() { _next = _start; _current = null; } public bool MoveNext() { VerifyUnchanged(); while ((_next >= 0) && (_next < _journal.TotalCount)) { _current = _journal[_next]; _next += _delta; if ((_filter == null) || _filter(_current)) { Debug.Assert(_current != null, "If we are returning true, our current cannot be null"); return true; } } _current = null; return false; } public object Current { get { return _current; } } ////// Verifies that the journal has not been changed since this enumerator was created /// protected void VerifyUnchanged() { if (_version != _journal.Version) { throw new InvalidOperationException(SR.Get(SRID.EnumeratorVersionChanged)); } } Journal _journal; int _start; int _delta; int _next; JournalEntry _current; JournalEntryFilter _filter; int _version; } internal class LimitedJournalEntryStackEnumerable : IEnumerable, INotifyCollectionChanged { internal LimitedJournalEntryStackEnumerable(IEnumerable ieble) { _ieble = ieble; INotifyCollectionChanged ichildnotify = ieble as INotifyCollectionChanged; if (ichildnotify != null) { ichildnotify.CollectionChanged += new NotifyCollectionChangedEventHandler(PropogateCollectionChanged); } } public IEnumerator GetEnumerator() { return new LimitedJournalEntryStackEnumerator(_ieble, DefaultMaxMenuEntries); } internal void PropogateCollectionChanged(object sender, NotifyCollectionChangedEventArgs e) { if (CollectionChanged != null) { CollectionChanged(this, e); } } private const uint DefaultMaxMenuEntries = 9; // the maximum number of items in the dropdown menus public event NotifyCollectionChangedEventHandler CollectionChanged; private IEnumerable _ieble; } internal class LimitedJournalEntryStackEnumerator : IEnumerator { internal LimitedJournalEntryStackEnumerator(IEnumerable ieble, uint viewLimit) { _ienum = ieble.GetEnumerator(); _viewLimit = viewLimit; } public void Reset() { _itemsReturned = 0; _ienum.Reset(); } public bool MoveNext() { bool success; if (_itemsReturned == _viewLimit) { success = false; } else { success = _ienum.MoveNext(); if (success) { _itemsReturned++; } } return success; } public object Current { get { return _ienum.Current; } } private uint _itemsReturned; private uint _viewLimit; private IEnumerator _ienum; } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved. using System; using System.Collections; using System.Collections.Specialized; using System.Collections.Generic; using System.Diagnostics; using System.Windows.Threading; using MS.Internal; using MS.Internal.AppModel; using MS.Utility; using System.ComponentModel; namespace System.Windows.Navigation { ////// This is the base class for the JournalEntryBackStack and JournalEntryForwardStack /// classes. /// internal abstract class JournalEntryStack : IEnumerable, INotifyCollectionChanged { internal JournalEntryStack(Journal journal) { _journal = journal; } internal void OnCollectionChanged() { if (CollectionChanged != null) { CollectionChanged(this, new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset)); } } internal JournalEntryFilter Filter { get { return _filter; } set { _filter = value; } } internal IEnumerable GetLimitedJournalEntryStackEnumerable() { if (_ljese == null) { _ljese = new LimitedJournalEntryStackEnumerable(this); } return _ljese; } LimitedJournalEntryStackEnumerable _ljese; protected JournalEntryFilter _filter; public event NotifyCollectionChangedEventHandler CollectionChanged; public abstract IEnumerator GetEnumerator(); protected Journal _journal; } ////// This class exists to provide an IEnumerator over the BackStack. /// internal class JournalEntryBackStack : JournalEntryStack { public JournalEntryBackStack(Journal journal) : base(journal) { } public override IEnumerator GetEnumerator() { //Debug.WriteLine("Getting BackStack"); return new JournalEntryStackEnumerator(_journal, _journal.CurrentIndex - 1, -1, this.Filter); } } ////// This class exists to provide an IEnumerator over the ForwardStack. /// internal class JournalEntryForwardStack : JournalEntryStack { public JournalEntryForwardStack(Journal journal) : base(journal) { } public override IEnumerator GetEnumerator() { //Debug.WriteLine("Getting ForwardStack"); return new JournalEntryStackEnumerator(_journal, _journal.CurrentIndex + 1, 1, this.Filter); } } ////// This will enumerate over the navigable JournalEntries in the journal, starting at start, /// going in the direction of delta, and returning no more than _viewLimit values. /// This is used for display purposes. /// internal class JournalEntryStackEnumerator : IEnumerator { public JournalEntryStackEnumerator(Journal journal, int start, int delta, JournalEntryFilter filter) { _journal = journal; _version = journal.Version; _start = start; _delta = delta; _filter = filter; this.Reset(); } public void Reset() { _next = _start; _current = null; } public bool MoveNext() { VerifyUnchanged(); while ((_next >= 0) && (_next < _journal.TotalCount)) { _current = _journal[_next]; _next += _delta; if ((_filter == null) || _filter(_current)) { Debug.Assert(_current != null, "If we are returning true, our current cannot be null"); return true; } } _current = null; return false; } public object Current { get { return _current; } } ////// Verifies that the journal has not been changed since this enumerator was created /// protected void VerifyUnchanged() { if (_version != _journal.Version) { throw new InvalidOperationException(SR.Get(SRID.EnumeratorVersionChanged)); } } Journal _journal; int _start; int _delta; int _next; JournalEntry _current; JournalEntryFilter _filter; int _version; } internal class LimitedJournalEntryStackEnumerable : IEnumerable, INotifyCollectionChanged { internal LimitedJournalEntryStackEnumerable(IEnumerable ieble) { _ieble = ieble; INotifyCollectionChanged ichildnotify = ieble as INotifyCollectionChanged; if (ichildnotify != null) { ichildnotify.CollectionChanged += new NotifyCollectionChangedEventHandler(PropogateCollectionChanged); } } public IEnumerator GetEnumerator() { return new LimitedJournalEntryStackEnumerator(_ieble, DefaultMaxMenuEntries); } internal void PropogateCollectionChanged(object sender, NotifyCollectionChangedEventArgs e) { if (CollectionChanged != null) { CollectionChanged(this, e); } } private const uint DefaultMaxMenuEntries = 9; // the maximum number of items in the dropdown menus public event NotifyCollectionChangedEventHandler CollectionChanged; private IEnumerable _ieble; } internal class LimitedJournalEntryStackEnumerator : IEnumerator { internal LimitedJournalEntryStackEnumerator(IEnumerable ieble, uint viewLimit) { _ienum = ieble.GetEnumerator(); _viewLimit = viewLimit; } public void Reset() { _itemsReturned = 0; _ienum.Reset(); } public bool MoveNext() { bool success; if (_itemsReturned == _viewLimit) { success = false; } else { success = _ienum.MoveNext(); if (success) { _itemsReturned++; } } return success; } public object Current { get { return _ienum.Current; } } private uint _itemsReturned; private uint _viewLimit; private IEnumerator _ienum; } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
Link Menu

This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- CompositeScriptReference.cs
- PathSegment.cs
- XmlEncodedRawTextWriter.cs
- ControlDesigner.cs
- DataGridViewCellLinkedList.cs
- Help.cs
- AppearanceEditorPart.cs
- FixedFlowMap.cs
- BitmapEffectDrawing.cs
- SortFieldComparer.cs
- SerialPort.cs
- WorkingDirectoryEditor.cs
- Typeface.cs
- DynamicObject.cs
- StylusPointProperty.cs
- EntityCommand.cs
- XmlSignatureProperties.cs
- TypeSystem.cs
- SecurityKeyUsage.cs
- ACL.cs
- EntityContainerEntitySetDefiningQuery.cs
- Operand.cs
- AnnouncementEventArgs.cs
- MaxValueConverter.cs
- XPathNodeIterator.cs
- AVElementHelper.cs
- XmlSerializationReader.cs
- MatrixAnimationUsingPath.cs
- ListChangedEventArgs.cs
- KeyGesture.cs
- ClientProtocol.cs
- EpmContentSerializerBase.cs
- ItemContainerGenerator.cs
- BindingValueChangedEventArgs.cs
- BitmapVisualManager.cs
- IndentTextWriter.cs
- AppSettingsExpressionEditor.cs
- TemplateKey.cs
- COM2IDispatchConverter.cs
- FileDataSourceCache.cs
- GridViewRowCollection.cs
- HtmlInputImage.cs
- RuntimeArgumentHandle.cs
- Camera.cs
- CodeAttributeDeclarationCollection.cs
- ProcessStartInfo.cs
- GacUtil.cs
- PolyLineSegment.cs
- BindValidator.cs
- MembershipUser.cs
- X509SubjectKeyIdentifierClause.cs
- ParserContext.cs
- HuffmanTree.cs
- SchemaImporterExtension.cs
- ArgIterator.cs
- RequestDescription.cs
- AuthStoreRoleProvider.cs
- ChangeInterceptorAttribute.cs
- BaseProcessor.cs
- SimpleHandlerBuildProvider.cs
- ImageField.cs
- TextBoxAutoCompleteSourceConverter.cs
- LogicalMethodInfo.cs
- BeginGetFileNameFromUserRequest.cs
- FixedFlowMap.cs
- CapabilitiesRule.cs
- LogWriteRestartAreaAsyncResult.cs
- RegularExpressionValidator.cs
- AesManaged.cs
- DBParameter.cs
- FixedSOMFixedBlock.cs
- Operator.cs
- OdbcUtils.cs
- ClientFormsIdentity.cs
- ConditionalWeakTable.cs
- OletxCommittableTransaction.cs
- DiscoveryMessageProperty.cs
- XPathNavigatorKeyComparer.cs
- TCPClient.cs
- Timer.cs
- ClientTargetSection.cs
- OdbcDataAdapter.cs
- DataGridViewImageCell.cs
- PassportIdentity.cs
- MarkupExtensionParser.cs
- FlowPosition.cs
- QueueProcessor.cs
- PlainXmlSerializer.cs
- HtmlShimManager.cs
- PieceNameHelper.cs
- AudioException.cs
- RowsCopiedEventArgs.cs
- Parameter.cs
- PageParserFilter.cs
- XmlSchemaValidationException.cs
- ComPersistableTypeElement.cs
- WsatStrings.cs
- HebrewNumber.cs
- ClientEventManager.cs
- BrowserInteropHelper.cs